Concrete-breaking machine



Patented Ian. 3, I899.

J. A. FAIRCHILD 81. G. R. WILTON.

' CONCRETE BREAKING MACHINE.

(Application filed Sept. 27, 1898.)

(No-Model.)

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NTTED STATES PATENT FFICE.

JOHN A. FAIROHILD AND GEORGE R. WILTON, OF LOS ANGELES, CALIFORNIA.

CONCRETE-BREAKING MACHINE.

SPECIFICATION forming part of Letters Patent N 0. 617,310, dated January 3, 1899.

Application filed September 27, 1898. Serial No. 692,005. (No model.)

To all whom it may concern:

Be it known that we, JOHN A. FAIRCHILD and GEORGE R. WILTON, citizens of the United States, residing at Los Angeles, county of Los Angeles, State of California, have invented a new and useful Improvement in Ooncrete-Breaking Machines, of which the fol lowing is a specification.

The object of our invention is to provide a machine that may be driven by power to break up considerable bodies of concrete which must be removed, such as heavy concrete foundations, conduits of abandoned cable street-railroads, and for other similar uses.

Figure l is a side view of our machine. Fig. 2 is a side view of our hammer and breaking-wedge attached together, the dowel-pins which attach them together showing in dotted lines. Fig. 3 is a vertical cross-section of the hammer and wedge, taken on line 3 3 of Fig. 2.

A is a heavy cast or wrought iron hammer, in the sides of which are vertical grooves that engage with and move upon guideways in the upright guide-standards of the frame B. In the top of the hammer is rigidly attached an eye D. In the bottom of the hammer are two sockets A, which are slightly frusto-conical in shape and in which the dowel-pins H fit that attach the breaking-wedge E to the hammer. The hammer has a transverse slot extending through it near the bottom, in which the upper ends of the sockets A terminate. The purpose of this slot is to enable the dowel-pins H to be ejected from the hammer when desired.

E is the breaking-wedge. It has two sock ets E, corresponding in shape and location with the sockets in the hammer, and is made from a forged piece of steel or iron, with the back side thereof having less taper than the front side. Steel is preferred, as it lasts longer.

F F are dowel-pins by which the hammer A and wedge E are attached together. These dowel-pins are forced into the sockets in the hammer and wedge under pressure, and their upper ends project into the slot A.

On the frame B is mounted a winch F, from which a rope I runs up over a pulley J and then down to and is fastened in the eye D of the hammer. Power is applied to the winch, and the hammer A, with wedge attached thereto, is drawn up until a sufficient height is attained, when they are allowed to drop with a heavy blow on the concrete to be broken. As the bottom of the wedge has a comparatively small surface, it soon breaks a hole in the concrete and wedges the brokenoff part away from the unbroken part. Should the separated parts be too large to be handled easily, the wedge E may be removed and a steel face put on in its place and the pieces broken as fine as desired. This steel face is not shown in the drawings, as it' is of ordinary construction.

Having described our invention, what we claim is 1. Inaconcrete-breaking machine,the hammer A having sockets A and transverse slot A, in combination with the wedge E having sockets E and dowel-pins H adapted to fasten the hammer and Wedge together.

2. In a concrete breaking machine the frame B, winch F, rope I, pulley J, hammer A having sockets A and slot A, wedge E having sockets E and dowel-pins I-I, all constructed located and operated for the uses set forth.

In witness that we claim the foregoing we have hereunto subscribed our names,this 20th day of September, 1898, at Los Angeles, Oalifornia.

JOHN A. FAIRCHILD. GEORGE E. \VILTON.

Witnesses:

G. E. HARPHAM, IDA O. LOWELL. 

